Water-gage cock.



No. 783,369. PATENTED FEB. 21, 1905. G. MLDEEM & W. I. ROWLAND.

WATER GAGE COCK.

APPLICATION FILED JUNE 22, 1904.

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UNITED STATES Patented February 21, 1905.

PATENT OEErcE.

OHARLES M. DEEM AND WASHINGTON I. ROWLAND, OF PARKERSBURG,

I WEST VIRGINIA.

WATER-GAGE COCK.

SPECIFICATION forming part of Letters Patent No 783,369, dated February21, 1905.

Application filed June 22, 1904. Serial No. 213,700.

To all whom, it may concern.-

Be it known that we, CHARLES M. DEEM and WASHINGTON I. ROWLAND, citizensof the United States, residing at Parkersburg, in the 5 county of Woodand State of West Virginia, have invented new and useful Improvements inVVater-Gage Oocks, of which the following is a specification.

Our invention relates to new and useful 10 improvements in water-gagecocks for locomotive or stat-1onary boilers; and its object is toprovide a device of this character to which repairs can be made whilethe boiler is in service and which does not require packing of 15 anykind.

A further object is to employ a screwless stem and a valve independentof the stem and which has a novel arrangement for lifting it from itsseat.

20 With the above and other objects in view the invention consists of abody having a springpressed plug-cock arranged therein and which isadapted to shut off the passage of fluid through the body, so as topermit repairs to 5 be made while the boiler is in service. A stem ismounted within one end of the body and is held normally upon a seatprovided therefor by a coiled spring which is out of the path of thefluid and is'not contacted thereby at any 3 time. One end of this stemis in the form of a can which is adapted to unseat a loose valve whichis held by gravity upon a seat provided therefor. A screw-plug islocated adjacent and in alinement with the loose valve, so that 35 byremoving said plug the valve thereunder can be removed and ground orrenewed as required.

The invention also consists in the further novel construction andcombination of parts 4 hereinafter more fully described and claimed,

and illustrated in the accompanying drawing, which is a longitudinalsection through the improved water-gage cock.

Referring to the drawing by numerals of 45 reference, 1 is the body ofthe device, having a threaded end 2. Within the opposite end of thisbody is a compartment 3, and extending from this compartment and throughbody 1 to the threaded end thereof is a passage 4.

This passage is intercepted by a tapered plugcock 5, having a passage 6therein adapted to register with passage 4. Cook is held in properposition within body 1 by means of a coiled spring 7, which is fittedwithin a screwplug 8, detachably mounted in body 1 at one end of thecock 5. Spring 7 presses against the end of said cock and holds itfirmly seated, so as to produce a tight joint. The projecting end 9 ofthe cock 5 is preferably formed angular, so

as to permit the same to be readily rotated by means of a suitableinstrument. An aperture 10 is formed in the top of compartment 3, andits walls are screw-threaded for engagement with a screw-plug 11, havinga stem 12, which projects into the compartment 3. Plug 11 has an angularhead 13, whereby the same can be readily rotated for the purpose ofremoving the plug from or placing it in position. An extension 14projects from body 1 at the bottom of compartment 3, preferably at rightangles to the body, and this extension has a passage 15 extendinglongitudinally therethrough from compartment 8 and constituting adischarge-opening. Seated upon the inner end of passage 15 and thebottom of compartment 3 is a loose valve, which comprises afrusto-conical head 16, from which depends a stem 17, having wings 18projecting laterally from its upper portion. Head 16 is arrangeddirectly below and slightly removed from stem 12, and therefore isprevented by said stem from becoming displaced.

Projecting from the extension 14'below but parallel with the body 1 isan externally-screwthreaded projection 19. A passage 20 is formed withinand extends through this projection, and the inner portion of thispassage is contracted to form a shoulder or seat 2,1. Passage 20 opensinto one side of passage 15 and in alinement with a recess 22, formed inthe opposite side of said passage 15. A stem 23 is revolubly mounted inpassage 20 and projects across passage 15, its end being revolublymounted in recess 22. This stem has a beveled collar 24 thereon, whichis adapted to bear on the seat 21, and a coiled spring 25 incloses andbears at opposite ends on collar 24 and on a screw-cap 26, respectively.This valve 16 lifted from its seat.

spring serves, therefore, to hold the collar 24" clamped against seat 21and forms a tight joint, which obviates the necessity of employingpacking. Cap 26 engages the threads on the projection 19. A groove 27 isformed within stem 23 at a point directly under the stem 17 of the loosevalve. A knob 28 is secured to the other end of stem 23.

When it is desired to repair any of the parts of this device, it ismerely necessary to rotate the cock 5 so as to cut off the escape offluid through passage 4 to compartment 3. The screw-cap 11 can then beremoved and Stem 23 and the spring thereon can also be easily removed byunscrewing the cap 26. It will be seen that these repairs can be madewithout placing the boiler out of service. By providing a stem 23, suchas described, it is unnecessary to employ packing, and, moreover, theuse of threads upon the stem is obviated. It will be seen that byturning the stem 23 the cam, which is produced by forming the groove 27,lifts valve 16 from its seat and by continuing the rotation of the stem23 stem 17 of the valve will drop into groove 27 and therefore permitvalve 16 to automatically shut off the passage of fluid through thebody 1. By employing a stem which is not provided with threads theobjectionable features incident to the use of threaded stems areobviated. It is well known that the tendency is to screw threaded stemstoo tight, thereby damaging both the valve and its seat and soon causingthem to leak. By our arrangement of a spring-pressed stem damageresulting from this practice is eliminated, as it is impossible tomisuse or strain any part, even though it be operated by a careless,thoughtless, or ignorant person.

' In the foregoing description we have shown the preferred form of ourinvention; but we do not limit ourselves thereto, as we are aware thatmodifications may be made therein without departing from the spirit orsacrificing any of the advantages thereof, and we therefore reservetheright to make such changes as fairly fall within the scope of ourinvention.

Having thus described the invention, what is claimed as new is In adevice of the class described, a body having a passage extendingtherethrough and communicating at its inner end with a valvechamberprovided in the body, a rotary plug valve intersecting the passage andhaving an opening adapted to register with the latter, said valve beingoperable for closing the passage, a discharge-passage leading from thevalve-chamber, a gravity-valve arranged in the latter and adapted tonormally close the discharge-passage, a tubular extension provided onthe body and having a removable cap closing its outer end, a shoulderformed within the tubular extension, a rotary stem seated in theextension and projecting at one end into and intersecting thedischarge-passage, a collar formed upon the stem to seat against theshoulder, a spring arranged within the extension and adapted to bear atits opposite ends upon the cap and collar respectively for pressing thelatter to seated position, a cam provided on the inner end of the stemand adapted during rotation of the latter to open the gravity-valve, anda removable plug tapped into the body and having an extension projectedinto the valve-chamber and constituting an abutment for limiting theopening movement of the gravity-valve.

In testimony whereof we aifix our signatures in presence of twoWitnesses.

Witnesses:

C. W. MAYHALL, A. B. MOFFATT.

